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GB 437-2009: Copper sulfate (For crops use)
Status: Valid GB 437: Evolution and historical versions
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Copper sulfate (For crops use)
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GB 437-2009
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| GB 437-1993 | English | 239 |
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Copper sulfate
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PDF similar to GB 437-2009
Standard similar to GB 437-2009 GB 2763.1 GB/T 18419 GB/T 18418 Basic data | Standard ID | GB 437-2009 (GB437-2009) | | Description (Translated English) | Copper sulfate (For crops use) | | Sector / Industry | National Standard | | Classification of Chinese Standard | G25 | | Classification of International Standard | 65.100.30 | | Word Count Estimation | 10,136 | | Date of Issue | 2009-04-27 | | Date of Implementation | 2009-11-01 | | Older Standard (superseded by this standard) | GB 437-1993 | | Quoted Standard | GB//T 601; GB/T 1604; GB/T 1605-2001; GB 3796 | | Adopted Standard | FAO 44.2s/TC/S-1989, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 5, 2009 (No. 145 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies requirements for copper sulfate, test methods and marking, labeling, packaging, storage and transportation, this standard applies to the five crystal water containing copper sulfate and impurities generated in the production of copper sulfate. | GB 437-2009: Copper sulfate (For crops use)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Copper sulfate (For crops use)
ICS 65.100.30
G25
National Standards of People's Republic of China
Replacing GB 437-1993
Copper sulphate (agricultural)
Published 2009-04-27
2009-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Foreword
This standard in Chapter 3, Section 5 is mandatory, the rest are recommended.
This modification uses standard FAO Specifications 44.2s/T C/S (1989) "copper sulfate" (CopperSulfate).
This standard modification method using foreign advanced standards for the redrafted law.
This standard and FAO specification "copper sulfate" (CopperSulfate) The main technical differences.
Standard control --- water-insoluble substance present is ≤0.2%, acidity of ≤0.2%, FAO specifications uncontrolled these two indicators.
This standard is a revision of GB 437-1993 "copper sulfate" is.
This standard and GB 437-1993 "copper sulfate" The main differences.
--- cancel the non-agricultural use of copper sulfate specifications and at the same time canceled and classification;
--- This standard increased the impurity arsenic, lead and cadmium control targets as. arsenic content ≤25mg/kg, the mass fraction of lead
≤125mg/kg and cadmium content ≤25mg/kg.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Pesticide Standardization Technical Committee (SAC/TC133).
This standard is drafted. Shenyang Chemical Research Institute.
Participated in the drafting of this standard. Otis Qingdao Biotechnology Co., Ltd., Jiangsu dragon Chemical Co., Ltd.
The main drafters of this standard. High Scenic, Zan Yan Kun, Li Xuechen, Feng Xiuzhen.
This standard supersedes the previous editions are.
--- GB 437-1964, GB 437-1980, GB 437-1993 (2004 review confirm).
Copper sulphate (agricultural)
Other names, structural formulas and physicochemical parameters of the product basic copper sulfate active ingredient is as follows.
ISO common name. coppersulfate
Chemical Name. Copper Sulfate
Structural Formula. CuSO4 · 5H2O
Molecular Weight. 249.7 (according to 2005 international relative atomic mass)
Biological activity. bactericidal
The relative density (15.6 ℃). 2.286
Solubility (g/kg). water, 148 (0 ℃); 230.5 (25 ℃); 335 (50 ℃); 736 (100 ℃)
Stability. copper sulfate crystals slowly weathering in air at 110 deg.] C water loss into the white monohydrate (CuSO4 · H2O). This product
Iron has a strong corrosive
Range 1
This standard specifies requirements for copper sulfate, Test Method for marking, labeling, packaging, storage and transportation.
This standard applies to copper sulfate containing copper sulfate 5 impurity and crystal water generated in the production thereof.
2 Normative references
Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard
Whether the latest versions of these documents. For undated references, the latest version applies to this standard.
Preparation GB/T 601 standard titration solution Chemicals
GB/T 1604 pesticide regulations for acceptance of goods
GB/T 1605-2001 sampling commercial pesticides
GB 3796 pesticide packaging General
3.1 Appearance
Blue or blue-green crystals, with no visible foreign matter.
3.2 Technical Specifications
Copper sulfate should meet the requirements of Table 1.
Table 1 copper sulfate Control Project Index
Item Index
Copper sulfate (CuSO4 · 5H2O) content /% ≥ 98.0
Arsenic mass fraction a/(mg/kg) ≤ 25
Pb mass fraction a/(mg/kg) ≤ 125
Cadmium mass fraction a/(mg/kg) ≤ 25
Water insoluble /% ≤ 0.2
Acidity (H2SO4 basis) /% ≤ 0.2
When a normal production, the mass fraction of arsenic, lead and cadmium content mass fraction was measured at least once every three months.
Test Method 4
4.1 Sampling
In accordance with GB/T 1605-2001 of "original drug product sampling" approach. Determining Sample packages with random number table method, the final sample
The amount should be less than 100g.
4.2 Identification Test
4.2.1 heating
After heating, the color should be blue to white, water was added to restore the color blue after cooling.
4.2.2 Precipitation
It was added dropwise a solution of barium chloride in the presence of hydrochloric acid, a white precipitate.
Determination of the mass fraction of copper sulfate 4.3
4.3.1 Method summary
Samples dissolved in water, under acidic conditions, adding an appropriate amount of potassium iodide was reacted with divalent copper, iodine precipitates equimolar to indicate starch
Agent, sodium thiosulfate standard titration solution precipitated iodine titration. From the volume of consumption of sodium thiosulfate standard titration solution, the sample is calculated sulfur
Acid copper content.
The following reaction formula.
2Cu2 ++ 4I- = 2CuI ↓ + I2
2S2O32- + I2 = S4O62- + 2I-
4.3.2 Reagents and solutions
Potassium iodide;
Nitric acid;
Glacial acetic acid;
NaF. saturated solution;
Sodium carbonate. saturated solution;
Acetic acid. φ (CH3COOH) = 36%;
Starch indicator solution. ρ (starch) = 5g/L;
Sodium thiosulfate standard titration solution. Ba (Na2S2O3) = 0.2mol/L, according to GB/T 601 and calibration formulations.
4.3.3 Determination Step
About 1g sample was weighed (accurate to 0.0002g) in 250mL Erlenmeyer flask, 100mL of water was added to dissolve, plus three drops of concentrated nitric acid, boiling,
Cooling, saturated sodium carbonate solution was added dropwise until a trace precipitate appears, then 4mL acetic acid solution was added, the solution was slightly acidic
Resistance, plus 10mL saturated sodium fluoride solution, 5g of potassium iodide titration with standard sodium thiosulfate solution titrated to a pale yellow solution. plus
Starch indicator solution 3mL, continue titration to the disappearance of the blue.
4.3.4 computing
The mass fraction of copper sulfate in the sample 1 (%) according to equation (1).
1 = Ba
Qiao · M ·
(1)
Where.
--- Ba actual concentration of sodium thiosulfate standard titration solution in units of moles per liter (mol/L);
Qiao --- titration sample solution, the volume of consumption of the standard sodium thiosulfate titration solution in milliliters (mL);
--- numerical molar mass M copper sulfate (CuSO4 · 5H2O), in units of grams per mole (g/mol) (M = 249.7).
4.3.5 allows poor
The measurement results of the two parallel error should not exceed 0.6%.
4.4 Determination of arsenic, lead and cadmium content
4.4.1 Determination of arsenic content of
4.4.1.1 Method summary
In the presence of potassium iodide and stannous chloride, the high arsenic in the sample solution is reduced to trivalent arsenic, trivalent arsenic and zinc particles under acidic conditions
Hydrogen generation generates arsine gas, removing hydrogen sulfide, then with yellow mercuric bromide formed by lead acetate test paper to orange stain cotton, and
Gutzeit standard quantitative comparison.
4.4.1.2 Reagents and solutions
hydrochloric acid.
Potassium iodide solution. ρ (KI) = 150g/L, stored in brown bottle (prepared before use).
Sodium hydroxide solution. ρ (NaOH) = 200g/L.
Sulfuric acid. Ba (H2SO4) = 1mol/L.
Stannous chloride solution. ρ (SnCl2 · 2H2O) = 400g/L, weigh 20g of stannous chloride (SnCl2 · 2H2O), was dissolved in 50mL salt
Acid; (0 ℃ stored at a refrigerator).
Lead acetate cotton. absorbent cotton immersed in a solution of lead acetate, dry out after 2h.
Arsenic metallic zinc.
Water. freshly distilled twice-distilled water.
Arsenic trioxide (As2O3). drying to constant weight stored in a sulfuric acid desiccator.
Arsenic standard solution A. Weigh 0.1320g trioxide in 1000mL volumetric flask, dissolve sodium hydroxide solution was added 5mL,
Was added a solution of 25mL sulfuric acid, diluted with water to the mark [solution ρ (As) = 0.100mg/mL].
Arsenic standard solution B. pipette to take the above solution 1mL in 100mL volumetric flask, was added a solution of sulfuric acid 1mL, diluted with water
Scale, shake [solution ρ (As) = 1.0μg/mL].
4.4.1.3 Instruments
Arsenic measuring apparatus. see Figure 1.
1 --- Erlenmeyer flask;
2 --- rubber stopper;
3 --- arsenic measuring tube;
4 --- nozzle;
5 --- glass cap.
Arsenic measuring apparatus 1 of FIG.
100mL Erlenmeyer flask.
Rubber stopper. a middle hole.
Arsenic glass test tube. length 18cm, the coarse thin, down to the inner diameter of the nozzle from 14cm to 6.5mm section, since the narrow gradually
Small end inner diameter of 1mm ~ 3mm, at 1cm proximal end has a hole, the diameter of 2mm, narrow and thin portions of the rubber stopper is inserted tightly in the lower
Out to the hole just below the rubber stopper. An upper thicker portion of lead acetate was charged cotton length 5cm ~ 6cm, to the upper end of the nozzle at least 3cm,
Arsenic measuring tube to the top flat circular orifice, polished top, below a hook on each side, is fixed by a glass cap.
Glass cap. below 6.5mm in diameter polished with crescent-shaped recess above the central circular hole. The use of Arsenic in the glass cap tube
Nozzle, so that circular holes match with each other, sandwiching a mercuric bromide paper, measuring the glass cap and tube fixing arsenic with a rubber band or other suitable method.
4.4.1.4 Determination Step
4.4.1.4.1 preparation of standard solution
Draw arsenic standard solution B1mL, 1.5mL, 2mL, 2.5mL, 3mL, were placed in a conical flask, add 5mL hydrochloric acid, water was added to the
30mL, 5mL plus potassium iodide solution, 5 drops of stannous chloride solution, mixed, room temperature for 10min.
4.4.1.4.2 prepared sample solution
0.1g sample was weighed (accurate to 0.0002g) placed in a conical flask, add 5mL hydrochloric acid, water was added to 30mL, 5mL plus potassium iodide
Solution, 5 drops of stannous chloride solution, mixed, placed in room temperature for 10min.
4.4.1.4.3 Determination
To the conical flask, 3g of each of the zinc arsenic, and now preloaded with plug cotton and mercury bromide lead acetate test paper of Arsenic
Tube placed 1h at 25 ℃, taken Gutzeit comparing the sample mass to give arsenic, arsenic spot color if the sample in the standard color Gutzeit
In addition, increase or decrease the sample weight, the sample may be compared Gutzeit color standard of the color Gutzeit.
4.4.1.5 computing
Arsenic content in the sample 2 (mg/kg), according to formula (2).
(2)
Where.
--- [rho] concentration of arsenic standard solution B, in micrograms per milliliter (μg/mL);
Qiao --- Sample Gutzeit arsenic standard solution B corresponds to the volume in milliliters (mL).
4.4.2 Determination of the mass fraction of lead
4.4.2.1 Method summary
Samples with hydrochloric acid - nitric acid decomposition, cadmium sample solution in an air - acetylene flame atomization, vapor atomic absorption resulting from the lead
Hollow cathode lamp emitted light of a characteristic wavelength of 217.0nm, and the absorbance is directly proportional to the concentration of cadmium based atomic state.
4.4.2.2 Reagents and solutions
hydrochloric acid;
Nitric acid;
Water. secondary distilled water;
Lead standard stock solution. ρ (Pb) = 1mg/mL;
Dissolved Acetylene.
4.4.2.3 Instruments
Atomic absorption spectrophotometer, with air - acetylene burner and lead hollow cathode lamp.
Heating plate. the temperature is adjustable at 250 ℃.
4.4.2.4 Determination Step
Preparation of sample solution 4.4.2.4.1
Weigh the sample (2 ~ 4) g (accurate to 0.0002g), a 100mL beaker, wetted with a small amount of water, and hydrochloric acid was added 30mL
10mL nitrate, covered with a watch glass at (150 ~ 200) ℃ boil on a hot plate after 30min, removed heating was continued dish surface, evaporated to near dryness,
Remove. After cooling, 50mL of hydrochloric acid and 4mL water, mixed and filtered. The filtrate was collected in a 100mL flask, drained after a small amount of water will
The residue was washed three times, combined in the filtrate, adding water to the mark, the standby.
Draw standard curve 4.4.2.4.2
Pipette lead standard stock solution 0.1mL, 0.2mL, 0.3mL to three 100mL volumetric flask, was added 4mL hydrochloric acid, washed with water
Volume, and mix. This concentration of lead standard solution were 1mg/kg, 2mg/kg, 3mg/kg. At the same time the preparation of blank solution. In election
At a given optimum conditions, using air - acetylene flame at a wavelength of 217.0nm, the reference solution as the blank, absorbance measured for each standard solution
Light value. Mass fraction of lead standard solution (mg/kg) as the abscissa, the absorbance value corresponding to the ordinate, drawing working curve.
4.4.2.4.3 Determination
Sample solution (or after suitable dilution) under the same measurement conditions of the standard solution measured absorbance of the sample solution, on the working curve
Isolated respective lead concentration (mg/kg).
4.4.2.5 computing
Lead sample mass fraction 3 (mg/kg), according to equation (3) is calculated.
(3)
Where.
--- [rho] concentration measured absorbance value of the sample on the calibration curve corresponding to the lead in milligrams per liter (mg/L);
100 --- total volume of sample solution, in milliliters (mL).
4.4.2.6 allow poor
This method of parallel measurement results of the difference between the two should be less than 10mg/kg.
4.4.3 Determination of the mass fraction of cadmium
4.4.3.1 Method summary
Samples with hydrochloric acid - nitric acid decomposition, cadmium sample in air - acetylene flame atomization, atomic vapor generated from the absorbed cadmium hollow
Cathode lamp emitted light of a characteristic wavelength of 228.8nm, and the absorbance is directly proportional to the concentration of cadmium based atomic state.
4.4.3.2 Reagents and solutions
hydrochloric acid;
Nitric acid;
Water. secondary distilled water;
Cadmium standard stock solution. ρ (Cd) = 1mg/mL;
Dissolved Acetylene.
4.4.3.3 Instruments
Atomic absorption spectrophotometer, with air - acetylene burner and cadmium hollow cathode lamp;
Heating plate. the temperature is adjustable at 250 ℃.
4.4.3.4 Determination Step
Preparation of sample solution 4.4.3.4.1
Weigh the sample (2 ~ 4) g (accurate to 0.0002g), a 100mL beaker, wetted with a small amount of water, and hydrochloric acid was added 30mL
10mL nitrate, covered with a watch glass at (150 ~ 200) ℃ boil on a hot plate after 30min, removed heating was continued dish surface, evaporated to near dryness,
Remove. After cooling, 50mL of hydrochloric acid and 4mL water, mixed and filtered. The filtrate was collected in a 100mL flask, the residue was rinsed with a small amount of water
3 and incorporated in the filtrate, adding water to the mark, the standby.
Draw standard curve 4.4.3.4.2
Standard stock solution 1.0mL suction cadmium in 100mL volumetric flask to volume with water and mix. It was drawn from the solution
1.0mL, 2.0mL, 4.0mL to three 100mL volumetric flask, was added 4mL hydrochloric acid, water to volume, and mix. At the same time the preparation blank
Solution, the concentration of this standard cadmium solution were 0.1mg/kg, 0.2mg/kg, 0.4mg/kg. Under the selected operating conditions, the
Air - acetylene flame at a wavelength of 228.8nm impose the blank solution as the reference value of each measured absorbance of standard solution. Cadmium standard solution
Mass concentration (mg/kg) as the abscissa, the absorbance value corresponding to the ordinate, drawing working curve.
4.4.3.4.3 Determination
Sample solution (or after suitable dilution) under the same measuring conditions as the standard solution, measuring absorbance of the sample solution, on the working curve
Isolated corresponding cadmium content (mg/kg).
4.4.3.5 computing
Cadmium content in the sample 4 (mg/kg), according to equation (4) is calculated.
(4)
Where.
--- [rho] concentration measured absorbance value of the sample on the working curve corresponding cadmium, in units of milligrams per liter (mg/L);
100 --- total volume of sample solution, in milliliters (mL).
4.4.3.6 allow poor
This method of parallel measurement results of the difference between the two should be less than 1mg/kg.
4.5 Determination of insoluble matter
4.5.1 Method summary
Sample was dissolved by heating an appropriate amount of water, dried, and insolubles were filtered hot, water-insoluble solid content of insoluble matter mass fraction of the sample
Calculation.
4.5.2 Reagents
water.
4.5.3 Instruments
Standard ground-stoppered Erlenmeyer flask. 250mL;
Fritted glass funnel crucible. G4 type;
Suction conical flask. 500mL;
Oven;
Glass dryer;
Water bath.
4.5.4 Determination Step
The glass fritted funnel crucible drying (110 ℃ about 1h) to a constant weight (to the nearest 0.0002g), cooled in a desiccator until use. Call
10g sample was taken (accurate to 0.0002g), placed in a conical flask, 100mL of water and 2 drops of concentrated sulfuric acid, heated to dissolve, while hot
Constant weight G4 filter crucible was filtered, the filter residue was washed with hot water with 20mL (co washed five times). The filter cake filled with G4 filter crucible, put
Into an oven at 105 ℃ ~ 110 ℃ in drying to constant weight.
4.5.5 computing
5 mass fraction of water-insoluble matter (%) according to equation (5) is calculated.
(5)
Where.
4.6 Determination of acidity
4.6.1 Reagents and solutions
Water. New boiled, pH value of 6 to 8;
Potassium hydrogen tartrate. saturated solution, pH = 3.56 (25 ℃); pH = 3.55 (30 ℃);
Glacial acetic acid;
Sodium hydroxide standard titration solution. Ba (NaOH) = 0.02mol/L, according to GB/T 601 and calibration formulations.
4.6.2 Instruments
pH meter (with magnetic stirrer);
Glass electrode;
Saturated calomel electrode;
Burette. 10mL, having 0.05mL indexing.
4.6.3 Determination Step
After stabilizing the instrument, the electrode is placed in standard buffer solution [pH of saturated potassium hydrogen tartrate, pH = 3.56 (25 ℃), pH =
3.55 (30 ℃)], the instrument reading position readings adjusted to pH standard buffer solution at this temperature, when reading standard buffer solution unchanged
When this instrument can be used.
4.6.3.2 Determination
About 2g sample was weighed (accurate to 0.002 g of), a 100mL beaker was added 50mL of water, under magnetic stirring to dissolve the sample,
Titration solution is then titrated with standard sodium hydroxide to a pH meter reading of 4.00, is the end.
4.6.4 computing
Acidity content of Sample 6 (%) according to equation (6) is calculated.
6 = Ba
Qiao · M ·
(6)
Where.
--- Ba actual concentration of sodium hydroxide standard titration solution in units of moles per liter (mol/L);
Qiao --- titration of the sample solution, the consumption of sodium hydroxide standard titration solution volume in milliliters (mL);
M --- 12H2SO sulfate () values of the molar mass of 4 units of grams per mole (g/mol) (M = 49).
4.7 product testing and acceptance
Shall comply with the provisions of GB/T 1604's. Limit values rounding processing using the value comparison method.
5 marking, labeling, packaging, storage, security
5.1 copper sulfate marking, labeling, packaging, should comply with the provisions of GB 3796.
5.2 packaging material can be iron sulfate, nonflammable plastic drum, fiber drum lined with double plastic bags, tightly sealed to prevent moisture absorption, but also
It may take other forms of packaging according to user requirements or ordering agreement, subject to the provisions of GB 3796.
5.3 sulfate package airiness, dry place.
5.4 storage and transportation to prevent moisture and sunlight, no food, seed, feed mix, avoid contact with skin, eyes, nose and mouth to prevent inhalation.
5.5 Security. copper sulfate is low toxicity fungicides, can be swallowed or inhaled toxic. When used, should wear protective gloves, masks, protective wear clean
clothes. Immediately after use with soap and water wash. Such as poisoning occurs, it is timely examination and treatment.
5.6 Warranty. Under the provisions of storage and transportation conditions, copper sulfate guarantee period from the date of manufacture 2 years.
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